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I've run Cat5e network cable throughout an office and have a patch panel where ADSL & phones come in.
The wall sockets are all RJ45 so I can run either phone or ethernet over them.
If someone accidentally were to plug their computer into the wrong outlet (one which has the phone signal on it), will it do any damage to the ethernet card in the computer? I think in NZ the lines are up around 45V.
What about if the phone is ringing?
I was thinking of putting a reducer into those ports anyway so it'd be clear that the phone goes on those. i.e. http://www.jaycar.com.au/productView.asp?ID=YT6055
1To be honest that Executive Summary could apply to anything. – Rich – 2011-05-13T13:20:48.893
I'm quite sure you're right. What I didn't realise is that I had assumed 100BaseT uses 2 pairs. I thought it used all 4 pairs of wires. So it makes sense that the voltage of the phone wouldn't hit the used pins. However, for 1000BaseT it might be a problem. I know the reducers are really expensive for bits of plastic. But so is the computer, so for a few dollars I'll use them for the few phones that we have. – Matt H – 2011-05-16T10:10:30.410